Whistles shrilled and LED batons motioned pedestrians to keep moving in Tokyo's buzzing Shibuya and Shinjuku districts Thursday amid a crackdown by local authorities to prevent overcrowding for Halloween.Celebrations in Shibuya were markedly toned down and few were seen wearing costumes, with police guiding people away from the area and a newly implemented year-round alcohol ban in full effect. The occasion had gained notoriety for unruliness in recent years in one of Tokyo's most popular tourist spots.The alcohol consumption ban is effective daily from 6 p.m. to 5 a.m. in areas surrounding…READ FULL ARTICLE